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Literature - Bridge failure

 
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B.V.Harsoda
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PostPosted: Sun Sep 04, 2016 7:28 pm    Post subject: Literature - Bridge failure Reply with quote

A Study of U.S. Bridge Failures (1980-2012)

G.C. Lee, S.B. Mohan, C. Huang and B.N. Fard




About the Report:

Keywords: earthquakes, bridges, Load and Resistance Factor Design (LRFD) factors, extreme hazard, multi-hazard, resilience

Abstract: Designing bridges to resist extreme hazard load effects has always been a safety concern of AASHTO and the bridge engineering community. This concern has been elevated in recent years because of the perceived increased frequency and intensity of extreme hazards that affect bridges. Some of these hazards have resulted in significant losses; for example, the 2005 Hurricane Katrina had damage exceeding $125 billion in addition to the loss of 1,833 lives. When a bridge failure occurs, the loss of the bridge structure is only one component of the total loss; its loss can result in much greater national economic consequences than the value of the asset itself. This has highlighted the need to intensify the exploration of design principles and methodologies for the optimal design of multiple hazard (MH) resilient bridges. A research project at the Multidisciplinary Center for Earthquake Engineering Research (MCEER), supported by FHWA since 2008, has been dedicated for this purpose. To pursue this task, it is essential to first establish reasonable bridge damage/failure models. Furthermore, most of the issues in developing or improving current bridge design specifications can be either addressed or improved by the collection and deep understanding of sufficient bridge damage information. Therefore, the initial task is to gather quantitative information of the hazard events and their damage effects on bridges through available bridge failure documentation. This report describes the information collected by the authors, with emphasis given to the data sources and an explanation on how the collected information is documented. The objective of this report is to establish data sources for developing load distribution models and bridge damage models for reliability-based formulation of design limit states. For example, the results of statistical analyses can be used to calibrate and determine a reasonable probability of failure for bridge design under current Load and Resistance Factor Design (LRFD) framework. Data collected so far, however, are insufficient for accomplishing the intended objectives, due to the lack of specific information on the hazards, bridge design and resulting economic losses in quantitative terms. Gathering such data will require engineering forensic studies on previously damaged bridges. A national or international workshop should be organized to establish standard measures for different hazards, and their impact on bridge damage/failures. These standardized measures should be used to enter data into the database for future events as well as for the results of forensic studies of past failures, one bridge at a time. To re-examine past bridge failures is a tedious and challenging task, but its long-term pay-off can be significant from the viewpoints of bridge safety and reduced economic losses.

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http://mceer.buffalo.edu/pdf/report/13-0008.pdf
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VPandya
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Joined: 09 Nov 2009
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PostPosted: Fri Sep 09, 2016 5:16 am    Post subject: This report on Bridge Failures must affect States & Centra Govt. work. Reply with quote

Dear  Engr.  Harsodaji,
This is very useful report by  AASHTO. A must read for all Structural Engineers. Also  this report must affect in a  big way the work to be done by Govt. Of  India and State Govts. on  INFRASTRUCTURE  development in the country.
I am sure Bridge Designers of  State and Central Govt. are reading this report with great attention. India both at Central and States level is going to spent huge amount of money  for  country's  INFRASTRUCTURE  development.  Also we need to do upgrading/retrofitting  of  existing  old  deteriorating bridges . In last few months we had  some major bridge failures in India.   We  better do  Bridges  work , New Design  or  Upgrading  right.

Regards.

Vasudeo Pandya  P.E.
Structural Engineer
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VPandya
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Joined: 09 Nov 2009
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PostPosted: Tue Oct 04, 2016 3:28 am    Post subject: IBSM ( INDIAN BRIDGE MANAGEMENT SYSTEM) of Govt. Of India. Reply with quote

Dear  all Sefi members,  
Govt. of India's  this step  IBMS ( INDIAN  BRIDGE  MANAGEMENT  SYSTEM) is worth great praise from all of us.  Hats  off  to  Hon.  Road Transportation Minister  Sri Nitin Gadkari. Details attached:  
CALL FOR PAPER ON  INDIAN BRIDGE MANAGEMENT SYSTEM:
FOR BRIDGE SUSTAINIBILITY BRIDGE MANAGEMENT:
Bridge Management refers to a system that monitors and maintains Bridges. Bridge management is a systematic process of creating inventory and managing the assets in a cost effective manner. It is a practice of managing bridges to achieve the high returns by monitoring and maintaining them with the objective of providing the best possible services to all its users. It aims to achieve cost effectiveness within the life cycle of the bridges and provide continuous and safe connectivity to its users.
IBMS-Protecting Indian Bridges CONCEPT
Indian Bridge Management System (IBMS) is developed to create an inventory of all bridge assets on National Highways (NH) in India and apply a technical logic to manage the bridge asset during its life cycle. It generates detailed inventory data and condition ratings of bridges to ensure that the dynamics of deterioration process are captured and this dynamism in the deterioration process guides the
inspection and rehabilitation of bridges. The system allows the user to assign priority to maintenance activity based on the present condition of the bridge. The progressive improvement of all bridge assets is ensured over a period of time as worst bridges are first rehabilitated and then the less damaged bridges are rehabilitated.
I think work done by or reports from  ASCE ( American Society Of Civil Engineers ) on this subject should be  of  a great help.


A pdf file attached.

Regards.

Vasudeo Pandya P.E.
Structural Engineer



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IBMS.Bridges.pdf
 Description:
IBMS Indian Bridge Management System Conference.

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